[2] Dearborn County is part of the Cincinnati, OH-KY-IN Metropolitan Statistical Area.In 1803, following Ohio's admission to the Union, a wedge, or pie shaped, remnant of the former Northwest Territory along Ohio's southwestern border was ceded to Indiana Territory and organized as Dearborn County.The region, nicknamed the "Gore", slices through the present-day counties of Dearborn, Franklin, Ohio, Randolph, Switzerland, Union, Wayne and Fayette.[8] At the 2010 United States Census, there were 50,047 people, 18,743 households and 13,773 families residing in the county.The commissioners are charged with executing the acts legislated by the council, collecting revenue, and managing the day-to-day functions of the county government.1 and the Honorable Sally McLaughlin, presiding over Dearborn County z Superior Court No.Each of these elected officers serves a term of four years and oversees a different part of county government.